Elevator.



PATENTED SEPT. 5, 1905. J. J. SCHWOB.

ELEVATOR.

APPLICATION FILED M116. 1905.

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PATBNTBD SEPT. 5, 1905' J. J. SCHWOB.

ELEVATOR.

APPLIoATIoN FILED un. 16. 1905.

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UNITE STATES ifATEN'I" FFIOE.

ELEVATOR.

Speccation of Letters Patent.

Patented Sept. 5, 1905.

Application filed January 16,1905. Serial No. 241,308.

To [LIZ uftmn/ it 71mg/ concern.

Be it known that I, Jo'HNJ. Scuwon, aciti- Zen of the United States. anda resident of St. Louis,Missou1i,liave invented certain new andusefulImprovements in Elevators, of which the following is aspecification, containing' a full, clear, and exact description,reference being' had to the accompanying drawings, forming a parthereof.

My invention relates to improvements in elevators; and it consists ofthe novel features herein shown, described, and claimed.

In the drawings, Fig'ure l is a perspective of an elevator-shaft and anelevator-car ernbodying the principles of myinvention. Fig. 2 is anenlarged inside elevation of the draftoperating mechanism. Fig'. 3 is anoutside elevation still Vfurther enlarged, said view being the reverseof Fig'. 2 and parts being' broken away to economize space. Fig. I is avertical sectional detail on the line -I 4: in Fig. B and looking' inthe direction indicated by the arrow. Fig. 5 is a horizontal sectionaldetail on the line 5 5 of Fig. 3 and looking' downwardly. Fig. 6 is across-section on the line 6 6 of Fig'. 8 and lookingin the directionindicated by the arrow. Fig'. 7 is a perspective of one of theswitch-operating levers. Fig. S is a perspective upon an enlarged scale,illustratingl the construction and operation of one of the switches.Fig. 9 is a perspective of the door-latch. Fig. l() is aside elevationof the draft mechanism. Fig. l1 is a crosssection.

Referring to the drawings in detail, the elevator-shaft comprisescorner-posts l5, 16, 17, and IS, the channel-bar I9, half-way betweenthe posts and 16, and the channelbar 20,half-way between the posts 17and 18. The guide-bars 2l and 22 are rigid with the. elevator-car .23and travel up and down inthe channel-bars 19 and 20. Thespacing-brackets a and Q5 are attached to the guidebar 2Q and thedraft-operating' mechanism, comprising' a straightway 26, the cam 27communicating with the ends of the straightway, the upper switch 28,pivotally mounted in position to close the upper end of the straightwayand open the upper end of the camway, and vice versa, the lower switch29, pivotally mounted in position to close the lower end of thestraightway and open the lower end of the camway, and vice versa, andmeans for operating the switches. The

bearing-block is located below the junction at the upper ends of thecamway 27 and the straightway 26. A sleeve 3l is rotatably mounted inthis hearing-block, and the shaft 3Q is rotatably mounted in the sleeve.The switch Q8 is lixed upon the inner end of the shaft 32, and a stop 33extends Vfrom the switch into a stop-recess 34, formed in the peripheryat the end of the sleeve 31, so as to make a limited amount of lostmotion between the sleeve 3l and the switch 28. A coil-spring 35 ismounted upon the sleeve 31, one end of the spring' being' connected tothe sleeve and the other end of the spring being connected tothe switchQS, the tension of the spring' being' exerted to hold the switch Q8yielding at one end of the lost motion. A wheel 36 is rigid with thecenter of the sleeve 3l, said wheel having a latehing-tooth 3T. Acoil-spring' is mounted upon the sleeve 31, one end of the spring beingattached to the sleeve and the other end of the spring being attached tothe bearing-block 30, the tension on said spring being' exerted in adirection opposite to the tension of the spring' 35, said tension beingexerted in opposition to' the tooth 37. A bell-crank lever39 is lixedupon the opposite end of the shaft from the switch 28 and at rightangles to the switch. A latch 40 is slidingly mounted in bearings eil,extending' inwardly from the bearing-block 30 in position to engage thetooth 37, and the sp1-ing? holds the latch yieldingly against theperiphery of the wheel 36.

A switch 29 is mounted upon its shaft 43 in a bearing-block La above thejunction of the lower ends of the camway with the straightway, and thebell-crank lever is fixed upon the inner end of the shaft at rightang'les to the switch. 'lhe rod 'TLG connects the bell -crank levers 3%)and 45, so that the switches Q8 and 29 will operate simultaneously, sothat when the upper end of the camway is closed by the switch 2S thelower end of the camway will be closed by the switch 29, and vicevcx'sa.

The cord 47 is attached to the latch et() and extends downwardly under aguide-roller 48 to a foot-lever il), said foot-lever being' inconvenient position Vl'or the operator, so that when the foot-lever ispressed the cord -I'T is pulled to release the latch et() from the tooth47.

A shaft 50 is mounted through the lower part of the bearing-block 30. Acrank-arm 3l is lixed upon the inner end of the shaft, and anoperating-arm 52 is fixed upon the outer end of the shaft, said arms 51and being in horizontal alinement in opposite direction and the arm 52being immediately in front of the camway 27. A shaft 53 is mountedthrough the lower bearing-block 54. A crankarm 55 is fixed upon theinner end of the shaft, and an operating-arm 56 is fixed upon the outerend of the shaft, said arms being normally in horizontal positions andextending in the same direction and the arm 56 being in front of thecamway. A rod 57 connects the arms 51 and 55, and a rod 58 connects thearm 51 to the arm 39, so that the switches may be closed by operatingthe arm 52 upwardly or the arm 56 downwardly. The lower end of the rod58 is slidingly con-r nected to the arm 51, so that when the arm 52swings downwardly the switches will not be moved or when the arm 52swings upwardly the switches will be moved to their closed positions.rlhe lower end of the rod 57 is slidingly connected to the arm 55, sothat when the arm 56 swings upwardly the switches will not be moved andwhen the arm 56 swings downwardly the'switches will be moved to theirclosed positions.

The draft-block 59 is mounted between the channel-bars 60 and 61, thechannel of said bars being toward each other and said channel-bars beingmounted horizontally between the posts 17 and 20, one set of bars foreach Hoor or landing'. A roller 62 is mounted at each corner of thedraft-block, said rollers operating' in the channels of the bars 60 and61, so as to provide antifriction-bearing for the draft-block and sothat the draft-block will move back and forth between the channel-bars.Arms 63 and 64 extend outwardly and downwardly from the draft-block 59,one on each side of the channel-bar 61, and the spring-seat 65 ismounted vertically between said arms. Arod 66 extends from thepulleyframe 67 through the spring-seat 65. Aspringseat 68 is mountedupon the end of the rod, and -the spring 69 is mounted upon the rodbetween the spring-seats 65 and 68. A groovepulley 7 O is mounted in thepulley-frame 67. A groove-pulley 71 is mounted in the pulleyframe 72,said frame being attached to the `post 20, and an eye 73 is attached tothe post 20. A cord 74 is attached to the eye 73 and extends around thepulley 70, around the pulley 71, over the guide 75, to the latchbar 76.

The lug 77 projects inwardly from the center of the draft-block 59. Aroller 78 is placed endwise against the lug 77, and a cap-screw 79 isinserted through the roller and screwseated in the lug to form a pintlefor the rolle-r, the head of the cap-screw being recessed into theroller.

A bearing-block 8O is secured to the door 81 near its rear edge, and asecond bearingblock 82 is secured in horizontal alinement of thebearing-block 8O in front of the door, and the latch-bar 76 is slidinglymounted in these bearing-blocks, the bearing-block 82 being elongated upand down, so as to allow the inner end of the latch-bar to vibrate. Alever 83 is pivotally connected to the inner end of the latch-bar and tothe door, said lever being inclined to an angle about forty-tive degreesrelative to the latch-bar, the upper end of the lever being nearer' tothe outerl end of the latch-bar than the lower end. A spring 85 connectsthe lever 83 to the door, the tension ofthe spring being exerted to holdthe latchbar down in its forward position, so that when a quick movementis applied to the cord 74 it will slightly pull the latch-bar outwardly,and as the latch-bar moves outwardly the lever 83 will raise the innerend, thereby disengaging the tooth 86 of the latch-bar from the tooth87, fixed upon the post1'5, so as to unlatch the door. The door 81 ishung at its top by means of common wheeled hangers mounted upon theusual inclined rail.

The roller 78 is in position to pass through either the straightway 26or the camway 27 as the elevator-car moves up and down. Assuming thatthe switches 28 and 29 are normally in the position shown in Fig. 24thatis, with the camway closed-then the roller 78 will pass up andvdownthrough the straightway 26, and the doors 81 will not be opened. If theoperator desires to open a door, he will press the foot-lever 49,thereby releasing the latch 40 from the tooth 37 and allowing thetension of the spring 38 to move the switches and close the straightway.Then the roller 78 will pass downwardly into the camway 27 and operatethe draft-block 59 to the left, thereby pulling the cord 74, moving thelatch-bar to the right, disengaging the tooth 86 from the tooth 87,bringing the lever 88 against the bearing-block 82, and moving the doorto its open position. rEhen as the roller 78 passes outwardly past thecenter of the camway 27 the cord is released and the door allowed toclose, which it does by the action of gravity, and as the roller passesthe arm 56 said arm will be swung outwardly, thereby moving the switchesto their normal positions with the latch 40 in engagement with the tooth37 and the straightway open. When the elevatorcar passes upwardly, theroller 78 will pass into the lower end of the cam way 27, and thereforeopen the door, and as said roller continues to move upwardly it willswing the lever 52 upwardly and return the switches to their normalposition.

I claim- 1. In an elevator: a car; a gate; a draftblock; a connectionbetween the gate and draft-block; a straightway carried by theelevator-car and normally open; a camway also carried by said car;switches controlling the straightway and camway; means whereby theoperator throws the switches when desired; and means whereby theelevator-car restores the switches to their normal position.

2. ln an elevator: a car; a gate; a draftby the elevator-car andnormally7 out of action; means whereby the operator places the cam inaction so to release the latch and open the gate; and means whereby thepassage of the elevator-car puts the cam out of action.

V[n testimony whereof I have signed my name to this specification inpresence of two sub- Seribing witnesses.

JOHN J. SCHWOB. Vitnesses:

ALFRED A. Eioiis, M. D. SCHULZE.

